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Time-Dependent Nuclear Energy-Density Functional Theory Toolkit for Neutron Star Crust: Dynamics of a Nucleus in a Neutron Superfluid
Physical Review X ( IF 11.6 ) Pub Date : 2024-12-03 , DOI: 10.1103/physrevx.14.041054
Daniel Pęcak, Agata Zdanowicz, Nicolas Chamel, Piotr Magierski, Gabriel Wlazłowski

We present a new numerical tool designed to probe the dense layers of neutron star crusts. It is based on the time-dependent Hartree-Fock-Bogoliubov theory with generalized Skyrme nuclear energy-density functionals of the Brussels-Montreal family. We use it to study the time evolution of a nucleus accelerating through superfluid neutron medium in the inner crust of a neutron star. We extract an effective mass in the low velocity limit. We observe a threshold velocity and specify mechanisms of dissipation: phonon emission, Cooper pairs breaking, and vortex rings creation. These microscopic effects are of key importance for understanding various neutron star phenomena. Moreover, the mechanisms we describe are general and apply also to other fermionic superfluids interacting with obstacles like liquid helium or ultracold gases. Published by the American Physical Society 2024

中文翻译:


中子星壳的时间依赖性核能密度泛函理论工具包:中子超流体中原子核的动力学



我们提出了一种新的数值工具,旨在探测中子星壳的致密层。它基于瞬态 Hartree-Fock-Bogoliubov 理论和布鲁塞尔-蒙特利尔家族的广义 Skyrme 核能密度泛函。我们用它来研究原子核在中子星内壳中通过超流体中子介质加速的时间演化。我们提取低速极限的有效质量。我们观察阈值速度并指定耗散机制:声子发射、库珀对断裂和涡旋环的产生。这些微观效应对于理解各种中子星现象至关重要。此外,我们描述的机制是通用的,也适用于与液氦或超冷气体等障碍物相互作用的其他费米子超流体。 美国物理学会 2024 年出版
更新日期:2024-12-03
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